The motor unit is composed of the motor neuron and innervated fibers, which are the ones that contract. 1) motor unit 2) contract.
<h3>
What is the motor unit?</h3>
The<u> motor unit</u> is the association between the motor neuron and a group of fibers from the muscle.
A single muscle is composed of several motor units. But the fibers involved in only one motor unit are just a little part of the whole muscle mass, meaning this is the part that will contract.
The motor unit is the basic unit from which the CNS controls motion.
Before contraction, there must be a stimulus that is received by receptors.
The CNA sends a message to respond to the stimulus.
The message is transmitted, by motor neurons, as chemical signals -neurotransmitters- which are received by the muscle fibers.
When the muscle cells receive this information, a cascade of events occurs that produce the local contraction of these fibers.
You can learn more about the motor unit at
brainly.com/question/18523459
#SPJ1
Answer: in order to form a new organism, two gametes -- the sex cells, sperm and egg -- must fuse, further mixing the genes to produce more genetic diversity. Asexual reproduction is one organism dividing into two organisms without shuffling its genes, so the offspring has the same version of genes as did the parent.
Answer:
78 chromosomes
Explanation:
Since the number of chromosomes in a dog are diploid, we have 2n chromosomes where n = number of chromosome pairs.
Since n = 39.
The number of chromosomes is 2n = 2 × 39 = 78 chromosomes
So, a dog has 78 chromosomes.
Answer and Explanation:
The people within this age range most likely want a baby for themselves/want more babies, or they don't feel like they should have to be limited to the amount of babies they want. Since it is their life and their bodies, they think it is up to them to decide how many to have and whether to have one or not.
<em><u>#teamtrees #PAW (Plant And Water)</u></em>
